Rockwell Automation 20B PowerFlex 700 AC Drives Vector Control (v4.001 and up) - Manual (Page 39)

Rockwell Automation Publication 20B-UM002G-EN-P - July 2014 39
Programming and Parameters Chapter 1
DYNAMIC
C
ONTROL
Load Limits
153 [Regen Power Limit]
Sets the maximum power limit allowed to
transfer from the motor to the DC bus. When
using an external dynamic brake, set this
parameter to its maximum value.
Default:
Min/Max:
Units:
–50.0%
–800.0/0.0%
0.1%
053
154 [Current Rate Limit]
Sets the largest allowable rate of change for the
current reference signal. This number is scaled in
percent of maximum motor current every 250
microseconds.
Default:
Min/Max:
Units:
400.0%
1.0/800.0%
0.1%
053
St
op/Brak
e Modes
145 [DB While Stopped]
Enables/disables dynamic brake operation when
drive is stopped. DB can operate if input voltage
becomes too high.
Disabled = DB will only operate when drive is
running.
Enable = DB can operate whenever drive is
energized.
Default:
Options:
0
0
1
“Disabled”
“Disabled”
“Enabled”
161
162
155
156 [Stop Mode A]
[Stop Mode B]
Active stop mode. [Stop Mode A] is active unless
[Stop Mode B] is selected by inputs.
(1) When using options 1, 2 or 4, refer to parameter 158
Attention statements.
Default:
Default:
Options:
1
0
0
1
2
3
4
“Ramp”
“Coast”
“Coast”
“Ramp”
(1)
“Ramp to Hold” (1)
“DC Brake”
“Fast Brake”
(1)
157
158
159
157 [DC Brake Lvl Sel]
Selects the source for [DC Brake Level].
Default:
Options:
0
0
1
2
“DC Brake Lvl”
“DC Brake Lvl”
“Analog In 1”
“Analog In 2”
155
156
158
159
158 [DC Brake Level]
Defines the DC brake current level injected into
the motor when “DC Brake” is selected as a stop
mode or when using the motor DC injection
brake feature through a digital input. This also
sets the braking current level when “Fast Stop” is
selected.
The DC braking voltage used in this function is
created by a PWM algorithm and may not
generate the smooth holding force needed for
some applications. Refer to the PowerFlex
Reference Manual.
Default:
Min/Max:
Units:
[Rated Amps]
0/[Rated Amps] x 1.5
(Equation yields approximate
maximum value.)
0.1 Amps
361
…
366
159 [DC Brake Time]
Sets the amount of time DC brake current is
“injected” into the motor. Not used for “Ramp to
Hold” which will apply DC braking continuously.
See page
143 .
Default:
Min/Max:
Units:
0.0 Secs
0.0/90.0 Secs
0.1 Secs
155
…
158
160 [Bus Reg Ki]
Sets the responsiveness of the bus regulator.
Default:
Min/Max:
Units:
450
0/5000
1
161
162
Fil
e
Gr
oup
No
.
Parameter Name & Description
See page 16 for symbol descriptions
Values
Rela
ted
FV
FV
ATTENTION: If a hazard of injury due to movement of equipment or
material exists, an auxiliary mechanical braking device must be used.
ATTENTION: This feature should not be used with synchronous or
permanent magnet motors. Motors can be demagnetized during
braking.