User Manual

132 Rockwell Automation Publication 20P-UM001K-EN-P - July 2014
Chapter 3 Programming and Parameters
MOTOR CONTROL
Field Config
498 [Force Min Field]
Enables/Disables the minimum field current value. Leave set to the default
value for permanent magnet motor applications.
• “Enabled” = The field current corresponds to the value set via Par 468
[Min Fld Curr Pct].
• “Disabled” = The field current is regulated based on the quadrant mode
and situation in which the drive is operating.
Note: This parameter can be assigned to a digital input (35 “Force MinFld”).
Default:
Options:
0 =
0 =
1 =
“Disabled”
“Disabled”
“Enabled”
16-bit
Int
499 [Field Economy En]
When this parameter is set to 1 = “Enabled” and the value in Par 107 [Speed
Zero Level] is reached (after the amount of time specified in Par 1407 [Field
Econ Delay] has elapsed), the minimum field current (set via Par 468 [Min Fld
Curr Pct]) is produced. Leave set to the default value for permanent magnet
motor applications.
• “Disabled” = Disables field economy
• “Enabled” = Enables field economy
Default:
Options:
1 =
0 =
1 =
“Enabled”
“Disabled”
“Enabled”
16-bit
Int
395,
468,
1407
916 [Fld Const 40 Pct]
This value corresponds to the field current required to produce 40% armature
voltage when the motor is running at base speed. Leave set to the default
value for permanent magnet motor applications.
Default:
Min/Max:
Units:
40.00
0.00 / 100.00
%
Real 469
917 [Fld Const 70 Pct]
This value corresponds to the field current required to produce 70% armature
voltage when the motor is running at base speed. Leave set to the default
value for permanent magnet motor applications.
Default:
Min/Max:
Units:
70.00
0.00 / 100.00
%
Real 469
918 [Fld Const 90 Pct]
This value corresponds to the field current required to produce 90% armature
voltage when the motor is running at base speed. Leave set to the default
value for permanent magnet motor applications.
Default:
Min/Max:
Units:
90.00
0.00 / 100.00
%
Real 469
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 Flux 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 341
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 Flux 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
File Group No.
Parameter Name & Description
See page 114 for symbol descriptions
Values
Data Type Related
A
ATTENTION: Enabling (forcing) the minimum field current while the drive is running could result in excessive motor
speed, equipment damage, and/or bodily injury.
A
A
A
A
A